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Gorbachev IA, Smirnov AV, Glukhovskoy EG, Kolesov VV, Ivanov GR, Kuznetsova IE. Morphology of Mixed Langmuir and Langmuir-Schaefer Monolayers with Covered CdSe/CdS/ZnS Quantum Dots and Arachidic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14105-14113. [PMID: 34793676 DOI: 10.1021/acs.langmuir.1c02345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The process of formation of a Langmuir-Schaefer (LS) matrix based on a mixed monolayer of arachidic acid (AA) and 8 nm CdSe/CdS/ZnS quantum dots (QDs) stabilized by molecules of trioctylphosphine oxide (TOPO) was investigated. The change in the morphology, monolayer compressibility, and area per elementary cell of the created mixed monolayers, depending on the ratio of the components, was studied. It is shown that the change in the morphology of Langmuir-Blodgett (LB) monolayers begins to occur at a ratio between the number of QDs and AA molecules of 1:24. Dendrimeric structures with a thickness of the order of 30-40 nm appear in the mixed monolayer when LB film deposition was carried out above the collapse surface pressure of a Langmuir film from only TOPO-covered QDs. Information on the dependence of the morphology of such structures on the molar ratio of the components is necessary for the production of ordered 2D nanostructures containing 0D and 1D objects with quantum bonds. Such nanostructures can be used in nanoelectronic and optoelectronic devices as a sensitive sensor element. The obtained results would be relevant for any type of spherical shape nanoparticles.
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Affiliation(s)
- Ilya A Gorbachev
- Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Science, Mokhovaya str. 11, bld.7, Moscow 125009, Russia
| | - Andrey V Smirnov
- Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Science, Mokhovaya str. 11, bld.7, Moscow 125009, Russia
| | | | - Vladimir V Kolesov
- Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Science, Mokhovaya str. 11, bld.7, Moscow 125009, Russia
| | - George R Ivanov
- University Laboratory "Nanoscience and Nanotechnology", University of Architecture, Civil Engineering and Geodesy, blvd. Hr. Smirnenski 1, Sofia 1164, Bulgaria
| | - Iren E Kuznetsova
- Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Science, Mokhovaya str. 11, bld.7, Moscow 125009, Russia
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2
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Jeon S, Jung MC, Ahn J, Woo HK, Bang J, Kim D, Lee SY, Woo HY, Jeon J, Han MJ, Paik T, Oh SJ. Post-synthetic oriented attachment of CsPbBr 3 perovskite nanocrystal building blocks: from first principle calculation to experimental demonstration of size and dimensionality (0D/1D/2D). NANOSCALE HORIZONS 2020; 5:960-970. [PMID: 32266901 DOI: 10.1039/d0nh00029a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Post-synthesis engineering methods that employ oriented attachment to precisely control the size and dimensionality (0D/1D/2D) of as-synthesized CsPbBr3 nanocrystals (NCs) are demonstrated. We investigated the chemical effects of the properties of polar solvents, including their immiscibility, polarity, and boiling point, on the surfaces of NCs, as well as their effect on the structural and optical properties of NCs. Appropriate exploitation of the solvent properties made it possible to use a polar solvent to mildly affect the NCs indirectly such that they discarded their ligands and became attached to proximal NCs without being destroyed. Based on our observations, we developed a method whereby a solution of the NCs in a non-polar solvent is mixed with a polar solvent to form an immiscible phase to induce epitaxial growth of CsPbBr3 NCs. The method enables the size of NCs to be easily regulated from 5 to 50 nm by controlling the engineering time. Taking advantage of the minimal effect of a mild solvent, we also developed a self-assembly method that operates at the liquid-air interface to systematically control the dimensionality. At this interface, the NCs self-assemble in the horizontal direction and grow into micron-sized, single-crystalline, defect-free nanowires (1D) and nanoplates (2D) via oriented attachment. Finally, we discuss the origin of the non-destructive oriented attachment phenomenon and the surface chemistry of a perovskite NC using density functional theory (DFT) simulations and a proposed model system.
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Affiliation(s)
- Sanghyun Jeon
- Department of Materials Science and Engineering, Korea University, 145, Anam-ro Seongbuk-gu, Seoul, 02841, Republic of Korea.
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3
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Soligno G, Vanmaekelbergh D. Phase diagrams of honeycomb and square nanocrystal superlattices from the nanocrystal’s surface chemistry at the dispersion-air interface. J Chem Phys 2019; 151:234702. [DOI: 10.1063/1.5128122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Giuseppe Soligno
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht 3584 CC, The Netherlands
| | - Daniel Vanmaekelbergh
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht 3584 CC, The Netherlands
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4
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Seven ES, Sharma SK, Meziane D, Zhou Y, Mintz KJ, Pandey RR, Chusuei CC, Leblanc RM. Close-Packed Langmuir Monolayers of Saccharide-Based Carbon Dots at the Air-Subphase Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6708-6718. [PMID: 31039318 DOI: 10.1021/acs.langmuir.9b00920] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Carbon dots (CDs) are zero-dimensional carbon-based spherical nanoparticles with diameters less than 10 nm. Here, we report for the first time CDs forming stable Langmuir monolayers at the air-subphase interface. Langmuir monolayers are of great interest both fundamentally to study the interactions at the interfaces and for many applications such as the development of sensors. However, CDs usually do not form Langmuir monolayers because of their highly hydrophilic nature. In this study, amphiphilic CDs were prepared through hydrothermal carbonization using saccharides as the precursors. The surface chemistry behavior and optical properties of CDs at the air-subphase interface were studied. CDs derived from saccharides consistently formed stable Langmuir monolayers which show all essential phases, namely, gas, liquid-expanded, liquid-condensed, and solid phases. The compression-decompression cycle method showed minimum hysteresis (4.3%), confirming the retaining capacity of the CDs as a monolayer. Limiting CD areas from surface pressure-area isotherm at the air-subphase interface were used to calculate the average diameter of the CDs at the air-subphase interface. UV/vis absorption spectra of CDs dispersed in water and in Langmuir monolayers had the same bands in the UV region. The intensity of the UV/vis absorption increases with increasing surface pressure at the air-subphase interface. Interestingly, photoluminescence (PL) of the Langmuir monolayer of CDs was excitation-independent, whereas the same CDs had excitation-dependent PL when dispersed in water.
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Affiliation(s)
- Elif S Seven
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
| | - Shiv K Sharma
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
| | - Dihya Meziane
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
| | - Yiqun Zhou
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
| | - Keenan J Mintz
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
| | - Raja R Pandey
- Department of Chemistry , Middle Tennessee State University , 440 Friendship Street , Murfreesboro , Tennessee 37132 , United States
| | - Charles C Chusuei
- Department of Chemistry , Middle Tennessee State University , 440 Friendship Street , Murfreesboro , Tennessee 37132 , United States
| | - Roger M Leblanc
- Department of Chemistry , University of Miami , 1301 Memorial Drive , Coral Gables , Florida 33146 , United States
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5
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Bahmani Jalali H, Melikov R, Sadeghi S, Nizamoglu S. Excitonic Energy Transfer within InP/ZnS Quantum Dot Langmuir-Blodgett Assemblies. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2018; 122:11616-11622. [PMID: 30057655 PMCID: PMC6057685 DOI: 10.1021/acs.jpcc.8b00744] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 05/05/2018] [Indexed: 05/11/2023]
Abstract
Interparticle energy transfer offers great promise to a diverse range of applications ranging from artificial solar energy harvesting to nanoscale rulers in biology. Here, we assembled InP/ZnS core/shell quantum dot monolayers via the Langmuir-Blodgett technique and studied the effect of ZnS shell thickness on the excitonic energy transfer within these core/shell quantum dots. Three types of InP-based core/shell quantum dot Langmuir-Blodgett assemblies with different ZnS shell thicknesses were assembled. The structural and optical properties of colloidal quantum dots reveal the successful multiple ZnS shell growth, and atomic force microscopy studies show the smoothness of the assembled monolayers. Time-resolved photoluminescence (PL) and fluorescence lifetime imaging microscopy (FLIM) studies of the thick-shell QD monolayer reveal narrower lifetime distribution in comparison with the thin-shell QD monolayer. The interparticle excitonic energy transfer was studied by spectrally resolved PL traces, and higher energy transfer was observed for the thin-shell InP/1ZnS QD monolayer. Finally, we calculated the average exciton energy and indicated that the energy transfer induced exciton energy shift decreased significantly from 95 to 27 meV after multiple ZnS shell growth.
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Affiliation(s)
- Houman Bahmani Jalali
- Department
of Biomedical Science and Engineering, Koç
University, Istanbul 34450, Turkey
| | - Rustamzhon Melikov
- Department
of Electrical and Electronics Engineering, Koç University, Istanbul 34450, Turkey
| | - Sadra Sadeghi
- Department
of Material Science and Engineering, Koç
University, Istanbul 34450, Turkey
| | - Sedat Nizamoglu
- Department
of Biomedical Science and Engineering, Koç
University, Istanbul 34450, Turkey
- Department
of Electrical and Electronics Engineering, Koç University, Istanbul 34450, Turkey
- Department
of Material Science and Engineering, Koç
University, Istanbul 34450, Turkey
- E-mail:
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6
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Qiao F, Wang X, Wang Q, He G, Xie Y. Functionalized self-assembly of colloidal CdX (X = S, Se) nanorods on solid substrates for device applications. NANOSCALE 2017; 9:8066-8079. [PMID: 28585959 DOI: 10.1039/c7nr01974b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In comparison to randomly oriented nanorods (NRs), self-assembly of the colloidal CdX (X = S, Se) NRs into well-organized large-scale structures results in unique collective properties. Moreover, the anisotropic structural features of self-assemblies preserved from colloidal CdX (X = S, Se) NRs have opened up exciting opportunities in the field of nanotechnology applications. We present the latest strategies for the self-assembly of colloidal NRs on solid substrates, and further focus on the self-assembled NRs for applications in devices. Advanced progress in the preparation of NR building blocks on the basis of nanofabrication techniques and comprehensive studies on the interactions of NRs with substrates will remarkably expand the application of colloidal semiconductor NRs. Understanding and mastering the driving forces behind the assembly of the NRs is the key goal of engineering future functional structures based on NRs.
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Affiliation(s)
- Fen Qiao
- School of Energy & Power Engineering, Jiangsu University, Zhenjiang, 212013, P R China.
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7
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Burin ME, Pushkarev AP, Fukin GK, Rumyantsev RV, Konev AN, Bochkarev MN. Synthesis of EuS and EuSe particles via thermal decomposition of dithio- and diselenophosphinate europium complexes. ACTA ACUST UNITED AC 2017. [DOI: 10.1134/s1995078017010025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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McPhail MR, Campbell GP, Bedzyk MJ, Weiss EA. Structural Features of PbS Nanocube Monolayers upon Treatment with Mono- and Dicarboxylic Acids and Thiols at a Liquid-Air Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6666-6673. [PMID: 27297625 DOI: 10.1021/acs.langmuir.6b01444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper describes the ordering of PbS nanocubes (NCs) within free-standing monolayers (suspended on acetonitrile), upon exchanging the native oleate ligands for a series of thiolate and carboxylate ligands at the liquid-air interface. Treatment with either carboxylic acids or thiols effectively decreases the inter-NC separation of nearest-neighbor particles without etching the NC surface. Dicarboxylic acids and dithiols bridge neighboring NCs with an interparticle separation that is consistent with fully extended, bridging ligands. Monocarboxylic acids and monothiols separate NCs by an amount governed by their length, with long-chain ligands showing significant intercalation. (1)H NMR spectroscopy shows carboxylic acids are more effective at replacing the native oleate than are thiols, which we ascribe to the lower pKa values of carboxylic acids. The fast exchange that occurs upon treatment with monocarboxylic acids kinetically traps the clusters of particles in nonclosed packed geometries, so monolayers treated with monocarboxylic acids are, on average, less ordered than those treated with monothiols. Ex situ electron microscopy and grazing incidence small-angle X-ray scattering (GISAXS) analyses of deposited films on Si/SiO2 substrates show that NCs exchanged with nonbridging ligands pack more efficiently at long length scales than do NCs exchanged with bridging ligands, due primarily to the creation of defects within the NC lattice in response to the rigidity of the bridging ligand.
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Affiliation(s)
- Martin R McPhail
- Department of Chemistry, ‡Department of Materials Science and Engineering, and §Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Gavin P Campbell
- Department of Chemistry, ‡Department of Materials Science and Engineering, and §Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Michael J Bedzyk
- Department of Chemistry, ‡Department of Materials Science and Engineering, and §Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, ‡Department of Materials Science and Engineering, and §Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208-3113, United States
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9
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Jiang Z, Matras-Postolek K, Yang P. Hydrophobic CdSe and CdTe quantum dots: shell coating, shape control, and self-assembly. RSC Adv 2016. [DOI: 10.1039/c6ra03408j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Several kinds of hydrophobic quantum dots including CdSe, CdTe, CdSe/CdxZn1−xS, and CdTe/CdSe/ZnSe were fabricated via organic synthesis to observe morphology variation during shell coating.
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Affiliation(s)
- Zhixiang Jiang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P.R. China
| | | | - Ping Yang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P.R. China
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10
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Milekhin AG, Sveshnikova LL, Duda TA, Rodyakina EE, Dzhagan VM, Gordan OD, Veber SL, Himcinschi C, Latyshev AV, Zahn DRT. Surface-enhanced Raman scattering by colloidal CdSe nanocrystal submonolayers fabricated by the Langmuir-Blodgett technique. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:2388-95. [PMID: 26734529 PMCID: PMC4685798 DOI: 10.3762/bjnano.6.245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
We present the results of an investigation of surface-enhanced Raman scattering (SERS) by optical phonons in colloidal CdSe nanocrystals (NCs) homogeneously deposited on both arrays of Au nanoclusters and Au dimers using the Langmuir-Blodgett technique. The coverage of the deposited NCs was less than one monolayer, as determined by transmission and scanning electron microscopy. SERS by optical phonons in CdSe nanocrystals showed a significant enhancement that depends resonantly on the Au nanocluster and dimer size, and thus on the localized surface plasmon resonance (LSPR) energy. The deposition of CdSe nanocrystals on the Au dimer nanocluster arrays enabled us to study the polarization dependence of SERS. The maximal SERS signal was observed for light polarization parallel to the dimer axis. The polarization ratio of the SERS signal parallel and perpendicular to the dimer axis was 20. The SERS signal intensity was also investigated as a function of the distance between nanoclusters in a dimer. Here the maximal SERS enhancement was observed for the minimal distance studied (about 10 nm), confirming the formation of SERS "hot spots".
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Affiliation(s)
- Alexander G Milekhin
- A.V. Rzhanov Institute of Semiconductor Physics, pr. Lavrentieva 13, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogov str. 2, Novosibirsk 630090, Russia
| | - Larisa L Sveshnikova
- A.V. Rzhanov Institute of Semiconductor Physics, pr. Lavrentieva 13, Novosibirsk 630090, Russia
| | - Tatyana A Duda
- A.V. Rzhanov Institute of Semiconductor Physics, pr. Lavrentieva 13, Novosibirsk 630090, Russia
| | - Ekaterina E Rodyakina
- A.V. Rzhanov Institute of Semiconductor Physics, pr. Lavrentieva 13, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogov str. 2, Novosibirsk 630090, Russia
| | - Volodymyr M Dzhagan
- Semiconductor Physics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
| | - Ovidiu D Gordan
- Semiconductor Physics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
| | - Sergey L Veber
- Novosibirsk State University, Pirogov str. 2, Novosibirsk 630090, Russia
- International Tomography Center SB RAS, Novosibirsk 630090, Russia
| | - Cameliu Himcinschi
- Institut für Theoretische Physik, TU Bergakademie Freiberg, 09596 Freiberg, Germany
| | - Alexander V Latyshev
- A.V. Rzhanov Institute of Semiconductor Physics, pr. Lavrentieva 13, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogov str. 2, Novosibirsk 630090, Russia
| | - Dietrich R T Zahn
- Semiconductor Physics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
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Paczesny J, Wolska-Pietkiewicz M, Binkiewicz I, Wróbel Z, Wadowska M, Matuła K, Dzięcielewski I, Pociecha D, Smalc-Koziorowska J, Lewiński J, Hołyst R. Towards Organized Hybrid Nanomaterials at the Air/Water Interface Based on Liquid-Crystal/ZnO Nanocrystals. Chemistry 2015; 21:16941-7. [DOI: 10.1002/chem.201502714] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Indexed: 11/08/2022]
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12
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Zaitsev S, Solovyeva D. Supramolecular nanostructures based on bacterial reaction center proteins and quantum dots. Adv Colloid Interface Sci 2015; 218:34-47. [PMID: 25660688 DOI: 10.1016/j.cis.2015.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 01/13/2015] [Accepted: 01/14/2015] [Indexed: 11/25/2022]
Abstract
Design of the nanostructures based on membrane proteins (the key functional elements of biomembranes) and colloid nanoparticles is a fascinating field at the interface of biochemistry and colloids, nanotechnology and biomedicine. The review discusses the main achievements in the field of ultrathin films prepared from bacterial reaction center proteins and light-harvesting complexes, as well as these complexes tagged with quantum dots. The principles of preparation of these thin films and their structure and properties at different interfaces are described; as well as their characteristics estimated using a combination of the modern interfacial techniques (absorption and fluorescence spectroscopy, atomic force and Brewster angle microscopy, etc.) are discussed. Further approaches to develop the nanostructures based on the membrane proteins and quantum dots are suggested. These supramolecular nanostructures are promising prototypes of the materials for photovoltaic, optoelectronic and biosensing applications.
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13
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Hasegawa Y. Photofunctional Lanthanoid Complexes, Coordination Polymers, and Nanocrystals for Future Photonic Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140155] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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14
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Shi Y, Liu L, Pang H, Zhou H, Zhang G, Ou Y, Zhang X, Du J, Xiao W. Facile preparation of highly luminescent CdTe quantum dots within hyperbranched poly(amidoamine)s and their application in bio-imaging. NANOSCALE RESEARCH LETTERS 2014; 9:115. [PMID: 24624925 PMCID: PMC4007777 DOI: 10.1186/1556-276x-9-115] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 02/21/2014] [Indexed: 06/03/2023]
Abstract
A new strategy for facile preparation of highly luminescent CdTe quantum dots (QDs) within amine-terminated hyperbranched poly(amidoamine)s (HPAMAM) was proposed in this paper. CdTe precursors were first prepared by adding NaHTe to aqueous Cd2+ chelated by 3-mercaptopropionic sodium (MPA-Na), and then HPAMAM was introduced to stabilize the CdTe precursors. After microwave irradiation, highly fluorescent and stable CdTe QDs stabilized by MPA-Na and HPAMAM were obtained. The CdTe QDs showed a high quantum yield (QY) up to 58%. By preparing CdTe QDs within HPAMAM, the biocompatibility properties of HPAMAM and the optical, electrical properties of CdTe QDs can be combined, endowing the CdTe QDs with biocompatibility. The resulting CdTe QDs can be directly used in biomedical fields, and their potential application in bio-imaging was investigated.
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Affiliation(s)
- Yunfeng Shi
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Lin Liu
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Huan Pang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Hongli Zhou
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Guanqing Zhang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Yangyan Ou
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Xiaoyin Zhang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Jimin Du
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People’s Republic of China
| | - Wangchuan Xiao
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, People’s Republic of China
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15
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Hines DA, Kamat PV. Recent advances in quantum dot surface chemistry. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3041-3057. [PMID: 24506801 DOI: 10.1021/am405196u] [Citation(s) in RCA: 165] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Quantum dot (QD) surface chemistry is an emerging field in semiconductor nanocrystal related research. Along with size manipulation, the careful control of QD surface chemistry allows modulation of the optical properties of a QD suspension. Even a single molecule bound to the surface can introduce new functionalities. Herein, we summarize the recent advances in QD surface chemistry and the resulting effects on optical and electronic properties. Specifically, this review addresses three main issues: (i) how surface chemistry affects the optical properties of QDs, (ii) how it influences the excited state dynamics, and (iii) how one can manipulate surface chemistry to control the interactions between QDs and metal oxides, metal nanoparticles, and in self-assembled QD monolayers.
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Affiliation(s)
- Douglas A Hines
- Notre Dame Radiation Laboratory, Department of Chemistry, Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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16
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Crawford NF, Leblanc RM. CdSe and CdSe(ZnS) quantum dots in 2D: A Langmuir monolayer approach. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.07.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Jung ME, Trzoss M, Tsay JM, Weiss S. A Bis(phosphine)-Modified Peptide Ligand for Stable and Luminescent Quantum Dots in Aqueous Media. SYNTHESIS-STUTTGART 2013; 45:2426-2430. [PMID: 24729639 DOI: 10.1055/s-0033-1339340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We describe a new class of ligands for semiconductor nanoparticles (quantum dots = QDs), which bind well and allow for their facile dissolution in aqueous solution. As a proof of principle, we have designed and synthesized a novel bis(phosphine)-modified peptide (BPMP) and shown that it has the ability to solubilize quantum dots in aqueous media. We further showed that the corresponding phosphine oxide derivatives of these new ligands are less good at solubilizing the quantum dots. These new bis(phosphine)-modified peptide ligands are easy to prepare and may well replace thiol-containing binding sequences in functionalized peptides for quantum dot coating, potentially resulting in quantum dots with higher quantum yields.
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Affiliation(s)
- Michael E Jung
- Department of Chemistry and Biochemistry, California NanoSystems Institute, and Department of Physiology, University of California at Los Angeles, Los Angeles, CA 90095-1569, USA
| | - Michael Trzoss
- Department of Chemistry and Biochemistry, California NanoSystems Institute, and Department of Physiology, University of California at Los Angeles, Los Angeles, CA 90095-1569, USA
| | - James M Tsay
- Department of Chemistry and Biochemistry, California NanoSystems Institute, and Department of Physiology, University of California at Los Angeles, Los Angeles, CA 90095-1569, USA
| | - Shimon Weiss
- Department of Chemistry and Biochemistry, California NanoSystems Institute, and Department of Physiology, University of California at Los Angeles, Los Angeles, CA 90095-1569, USA
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18
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Smooth surface roughness of silanized CdSe(ZnS) quantum dots. J Colloid Interface Sci 2013; 393:21-8. [DOI: 10.1016/j.jcis.2012.10.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 08/29/2012] [Accepted: 10/02/2012] [Indexed: 11/18/2022]
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19
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Hasegawa Y. Magnetic Semiconductor EuO, EuS, and EuSe Nanocrystals for Future Optical Devices. CHEM LETT 2013. [DOI: 10.1246/cl.2013.2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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20
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Templating CdSe tetrapods at the air/water interface with POPC lipids. J Colloid Interface Sci 2012; 378:58-63. [DOI: 10.1016/j.jcis.2012.04.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/06/2012] [Accepted: 04/07/2012] [Indexed: 11/30/2022]
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21
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Adsorption of nanoparticles at the solid–liquid interface. J Colloid Interface Sci 2012; 374:287-90. [DOI: 10.1016/j.jcis.2012.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 02/03/2012] [Accepted: 02/04/2012] [Indexed: 11/20/2022]
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22
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Sharma A, Pandey CM, Matharu Z, Soni U, Sapra S, Sumana G, Pandey MK, Chatterjee T, Malhotra BD. Nanopatterned cadmium selenide Langmuir-Blodgett platform for leukemia detection. Anal Chem 2012; 84:3082-9. [PMID: 22380657 DOI: 10.1021/ac202265a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We present results of the studies relating to preparation of Langmuir-Blodgett (LB) monolayers of tri-n-octylphosphine oxide-capped cadmium selenide quantum dots (QCdSe) onto indium-tin oxide (ITO) coated glass substrate. The monolayer behavior has been studied at the air-water interface under various subphase conditions. This nanopatterned platform has been explored to fabricate an electrochemical DNA biosensor for detection of chronic myelogenous leukemia (CML) by covalently immobilizing the thiol-terminated oligonucleotide probe sequence via a displacement reaction. The results of electrochemical response studies reveal that this biosensor can detect target DNA in the range of 10(-6) to 10(-14) M within 120 s, has a shelf life of 2 months, and can be used about 8 times. Further, this nucleic acid sensor has been found to distinguish the CML-positive and the control negative clinical patient samples.
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Affiliation(s)
- Aditya Sharma
- Department of Science & Technology Centre on Biomolecular Electronics, Biomedical Instrumentation Section, Materials Physics & Engineering Division, National Physical Laboratory (Council of Scientific & Industrial Research), Dr K. S. Krishnan Marg, New Delhi 110012, India
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23
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Wang H, Nakazaki J, Kubo T, Segawa H. Excitation Energy Transfer from Quantum Dots to Porphyrin J-aggregates in Hybrid Langmuir–Blodgett Multilayers. CHEM LETT 2012. [DOI: 10.1246/cl.2012.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Haibin Wang
- Research Center for Advanced Science and Technology, The University of Tokyo
| | - Jotaro Nakazaki
- Research Center for Advanced Science and Technology, The University of Tokyo
| | - Takaya Kubo
- Research Center for Advanced Science and Technology, The University of Tokyo
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology, The University of Tokyo
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24
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Ayyad O, Muñoz-Rojas D, Gómez-Romero P. Direct synthesis of a macroscopic array of naked Ag nanoparticles. Chem Commun (Camb) 2011; 47:11285-7. [PMID: 21931892 DOI: 10.1039/c1cc13353e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 2-D array of naked Ag nanoparticles has been synthesized through interfacial reduction of Ag(+) under hydrothermal conditions. The process bestows the synthesis, nucleation, growth and self-assembly of the nanoparticles in a simple one-pot reaction and makes use of no additive or capping agent. The resulting macroscopic liquid silver mirror is highly stable and composed of tightly packed naked Ag nanoparticles (17 (3) nm diameter, with interparticle gaps of 1.3 (1.0) nm) which can be easily transferred to a given substrate for application.
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Affiliation(s)
- Omar Ayyad
- Centro de Investigación en Nanociencia y Nanotecnologia, CIN2 (CSIC-ICN), UAB, Bellaterra 08193, Spain.
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25
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Synthesis and assembly of ultrathin film of Ni(OH)2 nanoparticles at gas/liquid interface, its high electrocatalytical oxidation toward bio-thiols and selective determination of cysteine. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.07.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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26
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Controlled self-assembly of hydrophobic quantum dots through silanization. J Colloid Interface Sci 2011; 361:9-15. [DOI: 10.1016/j.jcis.2011.05.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 05/15/2011] [Accepted: 05/17/2011] [Indexed: 11/20/2022]
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27
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Hybrid SiO2-coated nanocrystal-based heterostructures: Assembly, morphology transition, and photoluminescence at room temperature. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Radhakrishnan C, Lo MKF, Knobler CM, Garcia-Garibay MA, Monbouquette HG. Capping-ligand effect on the stability of CdSe quantum dot Langmuir monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2099-2103. [PMID: 21329375 DOI: 10.1021/la104244x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The stability of Langmuir monolayers of CdSe Qdots capped with dodecan-ethiol (DDT), with dithiocarbamates having one, two, or three long alkyl chains (DTC-1, DTC-2 and DTC-3) or with tri-n-octylphosphine oxide (TOPO), was investigated and linked to the transport of Qdots into the subphase via a dissolution and diffusion mechanism. Langmuir films of Qdots were created by depositing droplets of purified Qdots in chloroform at the air-water interface. While holding the Qdot films at 13 mN/m for 1 h in a Langmuir trough, the average monolayer areas decreased by roughly 9% for TOPO-capped Qdots, ∼15-18% for the three DTC-capped Qdot preparations, and ∼21% for DDT-capped Qdots. Using the model of Ter Minassian-Saraga, the relative stabilities of the Qdot films studied were related to differences in equilibrium partitioning into the subphase and to apparent Qdot diffusivities within the subphase. An analysis of the Qdot preparations by Fourier-transform infrared spectroscopy (FTIR) revealed that the aliphatic tails of capping ligands were assembled on Qdot surfaces with similar packing densities for all ligand chemistries. A combined analysis of the film-area contraction and FTIR data suggested that, for the chemistries examined in this study, both the capping-ligand headgroup and the aliphatic tail groups impact Qdot Langmuir film stability through their joint influence on nanoparticle wettability and the tendency to aggregate upon partitioning into the subphase.
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Affiliation(s)
- Chander Radhakrishnan
- Department of Chemical and Biomolecular Engineering, ‡Department of Chemistry and Biochemistry, and §California NanoSystems Institute (CNSI), University of California at Los Angeles , Los Angeles, California 90095, United States
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29
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Wu W, Zhou T, Berliner A, Banerjee P, Zhou S. Glucose-mediated assembly of phenylboronic acid modified CdTe/ZnTe/ZnS quantum dots for intracellular glucose probing. Angew Chem Int Ed Engl 2011; 49:6554-8. [PMID: 20669205 DOI: 10.1002/anie.201001508] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Weitai Wu
- Department of Chemistry, College of Staten Island of The City University of New York, Staten Island, NY 10314, USA
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30
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Yu Z, Wang CF, Chen S. Fabrication of quantum dot-based photonic materials from small to large via interfacial self-assembly. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10281h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Yang P, Yuan Z, Yang J, Zhang A, Cao Y, Jiang Q, Shi R, Liu F, Cheng X. Science as art: self-assembly of hybrid SiO2-coated nanocrystals. CrystEngComm 2011. [DOI: 10.1039/c0ce00350f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Niu Z, He J, Russell TP, Wang Q. Synthese von Nano-/Mikrostrukturen an fluiden Grenzflächen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001623] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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33
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Niu Z, He J, Russell TP, Wang Q. Synthesis of Nano/Microstructures at Fluid Interfaces. Angew Chem Int Ed Engl 2010; 49:10052-66. [DOI: 10.1002/anie.201001623] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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34
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Wu W, Zhou T, Berliner A, Banerjee P, Zhou S. Glucose-Mediated Assembly of Phenylboronic Acid Modified CdTe/ZnTe/ZnS Quantum Dots for Intracellular Glucose Probing. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001508] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Munechika K, Chen Y, Tillack AF, Kulkarni AP, Plante IJL, Munro AM, Ginger DS. Spectral control of plasmonic emission enhancement from quantum dots near single silver nanoprisms. NANO LETTERS 2010; 10:2598-2603. [PMID: 20503980 DOI: 10.1021/nl101281a] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The near-field effects of plasmonic optical antennas are being explored in applications ranging from biosensors to solar cells. We demonstrate that photoluminescence emission enhancement from CdSe quantum dots (QDs) can be obtained in the absence of any excitation enhancement near single silver nanoprisms. The spectral dependence of the radiative and nonradiative decay rate of the QDs closely follows the silver nanoparticle plasmon scattering spectrum. Using both experiment and theory we show that, in the absence of excitation enhancement, the ratio of radiative to nonradiative decay rate enhancement is proportional to the silver nanoparticle scattering efficiency. These results provide guidelines both for separating excitation and emission enhancement effects in sensing and device applications and for tailoring emission enhancement effects using plasmonic nanostructures.
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Affiliation(s)
- Keiko Munechika
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA
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36
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Shallcross RC, Chawla GS, Marikkar FS, Tolbert S, Pyun J, Armstrong NR. Efficient CdSe nanocrystal diffraction gratings prepared by microcontact molding. ACS NANO 2009; 3:3629-3637. [PMID: 19803496 DOI: 10.1021/nn900735y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe the formation of efficient transmission diffraction gratings created from patterned high quality ligand-capped CdSe nanocrystals (NCs), using a facile microcontact molding procedure. Soft polymer replicas of commercially available master gratings were "inked" with solvated NCs and the resulting pattern transferred to a variety of substrates after drying. Large-area (>0.5 cm(2)), defect free diffraction gratings were prepared with a variety of submicrometer line spacings and feature sizes down to ca. 160 nm. The morphology of the resulting pattern was tuned by controlling the concentration of the NC-based ink. Optimized gratings (1200 g/mm) showed an increase in transmission diffraction efficiency (DE) with increasing nanocrystal diameter. DE = ca. 15% (488 nm) for 2.5 nm diameter NCs versus DE = ca. 25-30% (488 nm) for 7.3 nm nanocrystals. These increases in DE are ascribed to changes in both the real (n) and imaginary (k) components of the complex index of refraction as NC diameter increases. We demonstrate the ability to in- and out-couple incident laser radiation into internal reflection elements using these stamped NC gratings, including single-mode waveguides, offering a novel application of ordered nanocrystal thin films.
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37
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Xu J, Wang C, Leblanc R. Surface chemistry and photophysical properties of a diacetylene-peptide derivative capped quantum dots Langmuir monolayer. Colloids Surf B Biointerfaces 2009; 70:163-8. [DOI: 10.1016/j.colsurfb.2008.11.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Revised: 11/03/2008] [Accepted: 11/07/2008] [Indexed: 11/15/2022]
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38
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Formation and Characterization of Two-Dimensional Arrays of Silver Oxide Nanoparticles under Langmuir Monolayers of n-Hexadecyl Dihydrogen Phosphate. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.12.2368] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Shi Y, Tu C, Zhu Q, Qian H, Ren J, Liu C, Zhu X, Yan D, Kong ESW, He P. Self-assembly of CdTe nanocrystals at the water/oil interface by amphiphilic hyperbranched polymers. NANOTECHNOLOGY 2008; 19:445609. [PMID: 21832741 DOI: 10.1088/0957-4484/19/44/445609] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A general strategy for realizing the self-assembly of aqueous CdTe nanocrystals (NCs) at the water/oil interface by means of an amphiphilic core-shell hyperbranched polymer has been proposed. Aqueous CdTe NCs were firstly transferred into the chloroform phase in the presence of palmityl chloride functionalized hyperbranched poly(amidoamine) (HPAMAM-PC), and then self-assembled at the water/chloroform interface by decreasing the pH value of the aqueous phase or introducing α-CDs to the aqueous phase. The resulting CdTe/HPAMAM-PC self-assembly film was characterized by fluorescence microscopy, UV-vis, PL, TEM, EDS, FT-IR, DSC and TGA.
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Affiliation(s)
- Yunfeng Shi
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
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40
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Kehlbeck JD, Hagerman ME, Cohen BD, Eliseo J, Fox M, Hoek W, Karlin D, Leibner E, Nagle E, Nolan M, Schaefer I, Toney A, Topka M, Uluski R, Wood C. Directed self-assembly in laponite/CdSe/polyaniline nanocomposites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:9727-9738. [PMID: 18661961 DOI: 10.1021/la800953w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Laponite films provide versatile inorganic scaffolds with materials architectures that direct the self-assembly of CdSe quantum dots (QDs or EviTags) and catalytic surfaces that promote the in situ polymerization of polyaniline (PANI) to yield novel nanocomposites for light emitting diodes (LEDs) and solar cell applications. Water-soluble CdSe EviTags with varying, overlapping emission wavelengths in the visible spectrum were incorporated using soft chemistry routes within Na-Laponite host film platforms to achieve broadband emission in the visible spectrum. QD concentrations, composition and synthesis approach were varied to optimize photophysical properties of the films and to mediate self-assembly, optical cascading and energy transfer. In addition, aniline tetramers coupled to CdSe (QD-AT) surfaces using a dithioate linker were embedded within Cu-Laponite nanoscaffolds and electronically coupled to PANI via vapor phase exposure. Nanotethering and specific host-guest and guest-guest interactions that mediate nanocomposite photophysical behavior were probed using electronic absorption and fluorescence spectroscopies, optical microscopy, AFM, SEM, powder XRD, NMR and ATR-FTIR. Morphology studies indicated that Lap/QD-AT films synthesized using mixed solvent, layer by layer (LbL) methods exhibited anisotropic supramolecular structures with unique mesoscopic ordering that affords bifunctional networks to optimize charge transport.
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Affiliation(s)
- Joanne D Kehlbeck
- Department of Chemistry, Union College, Schenectady, New York 12308, USA.
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41
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Gole A, Jana NR, Selvan ST, Ying JY. Langmuir-Blodgett thin films of quantum dots: synthesis, surface modification, and fluorescence resonance energy transfer (FRET) studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8181-8186. [PMID: 18590286 DOI: 10.1021/la8000224] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We describe herein studies on as-prepared hydrophobic ZnS-CdSe quantum dots (QDs) at the air-water interface. Surface pressure-area (pi-A) isotherms have been used to study the monolayer behavior. Uniform, lamellar multilayer thin films of QDs were deposited by the Langmuir-Blodgett (LB) technique. The role of two different surfactant systems commonly employed in the synthesis of these QDs (trioctylphosphine oxide-octadecylamine (TOPO-ODA) system and trioctylphosphine oxide-tetradecylphosphonic acid (TOPO-TDPA) system) on the monolayer behavior and the quality of thin films produced has been investigated. The thin films were characterized by quartz crystal microgravimetry (QCM), contact angle measurements, fluorescence spectroscopy, and transmission electron microscopy (TEM). These QD films were further modified by an amphiphilic polymer, poly(maleic anhydride-alt-1-tetradecene) (PMA). The hydrophobic interaction between the polymers and the surfactants attached to the QDs drove the self-assembly process. The carboxylic acid functional groups in the polymer were also used to immobilize avidin. We have demonstrated a proof of concept for the biosensing strategy wherein the avidin-coated QD films attracted biotinylated gold nanoparticles, resulting in fluorescence resonance energy transfer (FRET) quenching of the thin films.
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Affiliation(s)
- Anand Gole
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669
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42
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Lambert K, Moreels I, Thourhout DV, Hens Z. Quantum dot micropatterning on si. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:5961-5966. [PMID: 18442279 DOI: 10.1021/la703664r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Using InP and PbSe quantum dots, we demonstrate that the Langmuir-Blodgett technique is well-suited to coat nonflat surfaces with quantum dot monolayers. This allows deposition on silicon substrates covered by a developed patterned resist, which results in monolayer patterns with micrometer resolution. Atomic force microscopy and scanning electron microscopy reveal the formation of a densely packed monolayer that replicates predefined structures with high selectivity after photoresist removal. A large variety of shapes can be reproduced and, due to the excellent adhesion of the quantum dots to the substrate, the hybrid approach can be repeated on the same substrate. This final possibility leads to complex, large-area quantum dot monolayer structures with micrometer spatial resolution that may combine different types of quantum dots.
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Affiliation(s)
- K Lambert
- Physics and Chemistry of Nanostructures, Ghent University, Krijgslaan 281-S12, B-9000 Ghent, Belgium
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43
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Hasegawa Y, Adachi TA, Tanaka A, Afzaal M, O’Brien P, Doi T, Hinatsu Y, Fujita K, Tanaka K, Kawai T. Remarkable Magneto-Optical Properties of Europium Selenide Nanoparticles with Wide Energy Gaps. J Am Chem Soc 2008; 130:5710-5. [DOI: 10.1021/ja710165m] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yasuchika Hasegawa
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Taka-aki Adachi
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Atsushi Tanaka
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mohammad Afzaal
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Paul O’Brien
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takahiro Doi
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yukio Hinatsu
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Koji Fujita
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Katsuhisa Tanaka
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tsuyoshi Kawai
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, The School of Chemistry and The School of Materials, The University of Manchester, Oxford Road, Manchester M13, 9PL, U.K., Graduate School of Science, Hokkaido University, North 10 West 8, Sapporo, Hokkaido 060-0810, Japan, and Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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44
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Liu HG, Xiao F, Wang CW, Xue Q, Chen X, Lee YI, Hao J, Jiang J. Synthesis of one-dimensional silver oxide nanoparticle arrays and silver nanorods templated by Langmuir monolayers. J Colloid Interface Sci 2007; 314:297-303. [PMID: 17570381 DOI: 10.1016/j.jcis.2007.05.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2007] [Revised: 05/02/2007] [Accepted: 05/17/2007] [Indexed: 10/23/2022]
Abstract
One-dimensional (1D) silver oxide nanoparticle arrays were synthesized by illuminating the composite Langmuir-Blodgett monolayers of porphyrin derivatives/Ag(+) and n-hexadecyl dihydrogen phosphate (n-HDP)/Ag(+) deposited on carbon-coated copper grids with daylight and then exposing them to air. Transmission electron microscopy (TEM) observation shows that the nanoparticle size is around 3 nm, with the separation of about 2-3 nm. High-resolution TEM (HRTEM) investigation indicates that the particles are made up of Ag(2)O. Ag nanorods with the width of 15-35 nm and the length of several hundreds of nanometers were synthesized by irradiating the composite Langmuir monolayers of porphyrin derivatives/Ag(+) and n-HDP/Ag(+) by UV-light directly at the air/water interface at room temperature. HRTEM image and selected-area electron diffraction (SAED) pattern indicate that the nanorods are single crystals with the (110) face of the face-centered cubic (fcc) silver parallel to the air/water interface. The formation of the 1D arrays and the nanorods should be attributed to the templating effect of the linear supramolecules formed by porphyrin derivative or n-HDP molecules in Langmuir monolayers through non-covalent interactions.
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Affiliation(s)
- Hong-Guo Liu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan 250100, China.
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Park JI, Jun YW, Choi JS, Cheon J. Highly crystalline anisotropic superstructures via magnetic field induced nanoparticle assembly. Chem Commun (Camb) 2007:5001-3. [DOI: 10.1039/b712513e] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Miller R, Fainerman VB, Kovalchuk VI, Grigoriev DO, Leser ME, Michel M. Composite interfacial layers containing micro-size and nano-size particles. Adv Colloid Interface Sci 2006; 128-130:17-26. [PMID: 17196540 DOI: 10.1016/j.cis.2006.11.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Surface layers of micro- and nanoparticles at fluid/liquid interfaces in absence and presence of surfactants are of large importance in the process of re-discovering Pickering systems, i.e. emulsions and foams stabilized by particles. The surface pressure/area isotherms of such layers can provide information about the properties of the used particles (dimensions, interfacial contact angles), the structure of interfacial layers, the interactions between the particles as well as about relaxation processes within the layers. For a correct description of Pi-A isotherms of composite surface layers containing particles the significant difference in size of these particles to that of solvent and surfactant molecules should be taken into account. Corresponding equations can be derived on the basis of the two-dimensional solution theory. The gained equations provide satisfactory agreement with experimental data and predict realistic values for the area of particles at the interface. Also equations of state and of the dilational elasticity for composite surface layers containing particles can be obtained in the framework of the presented methodology.
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Affiliation(s)
- R Miller
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, 14424 Potsdam/Golm, Germany.
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Lambert K, Wittebrood L, Moreels I, Deresmes D, Grandidier B, Hens Z. Langmuir–Blodgett monolayers of InP quantum dots with short chain ligands. J Colloid Interface Sci 2006; 300:597-602. [PMID: 16677661 DOI: 10.1016/j.jcis.2006.04.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2006] [Revised: 04/06/2006] [Accepted: 04/06/2006] [Indexed: 11/17/2022]
Abstract
We demonstrate the organization of nearly monodisperse colloidal InP quantum dots at the air/water interface in Langmuir monolayers. The organization of the particles is monitored in situ by surface pressure-surface area measurements and ex situ by AFM measurements on films transferred to mica by Langmuir-Blodgett deposition. The influence of different ligands on the quality of the monolayer formed has been studied. We show that densely packed monolayers with little holes can be formed using short chain ligands like pyridine and pentamethylene sulfide. The advantage of using short chain ligands for electron tunneling to or from the quantum dots is demonstrated using scanning tunneling spectroscopy.
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Affiliation(s)
- K Lambert
- Physical Chemistry Laboratory, Ghent University, Krijgslaan 281 , 9000 Ghent, Belgium
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Shen YJ, Lee YL, Yang YM. Monolayer Behavior and Langmuir−Blodgett Manipulation of CdS Quantum Dots. J Phys Chem B 2006; 110:9556-64. [PMID: 16686502 DOI: 10.1021/jp060416k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cadmium sulfide (CdS) quantum dots (QDs) were prepared and surface modified by dodecanthiol or mercaptosuccinic acid (MSA) to render a surface with alkyl chains (C(12)-CdS) or carboxylic acid groups (MSA-CdS), respectively. Due to the hydrophobic property of C(12)-CdS, the nanoparticles disperse well in chloroform and stay stable at the air/water interface. However, 3-dimensional (3D) aggregative domains and particle-free pores were formed in the monolayer due to poor particle-water interaction. For the MSA-CdS nanoparticles, the surface was hydrophobized through physical adsorption of a cationic surfactant, cetyltrimethylammonium bromide (CTAB). The capped MSA on the CdS plays an important role in enhancing the adsorption of CTAB and improving the stability of the QDs at the air/water interface. Due to the reversible adsorption of CTAB on MSA-CdS, a hydrophilic area can be exposed in the water-contacting region of a nanoparticle when it stays at the air/water interface. Thus, the CTAB-MSA-CdS QD behaves as an amphiphilic compound at the air/water interface and has properties superior to those of C(12)-CdS QDs in fabrication of layer-by-layer 2D structure of particulate films. The distinct behaviors of the two QDs at the air/water interface and the related effect on the properties of LB films were studied using a number of methods, including pressure-area (pi-A) isotherm, relaxation and hysteresis experiments, in-situ observation of Brewster angle microscopy (BAM), the postdeposition analysis of atomic force microscopy (AFM), and UV-vis spectroscopy.
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Affiliation(s)
- Yu-Jen Shen
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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Heriot SY, Zhang HL, Evans SD, Richardson TH. Multilayers of 4-methylbenzenethiol functionalized gold nanoparticles fabricated by Langmuir–Blodgett and Langmuir–Schaefer deposition. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2005.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zhang L, Shen Y, Xie A, Li S, Jin B, Zhang Q. One-Step Synthesis of Monodisperse Silver Nanoparticles beneath Vitamin E Langmuir Monolayers. J Phys Chem B 2006; 110:6615-20. [PMID: 16570962 DOI: 10.1021/jp0570216] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The monodisperse silver nanoparticles were synthesized by one-step reduction of silver ions in the alkaline subphase beneath vitamin E (VE) Langmuir monolayers. The monolayers and silver nanocomposite LB films were characterized by surface pressure-area (pi-A) isotherms, transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis), selected area electron diffraction (SAED), Fourier transform infrared transmission spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), respectively. The results showed that the limiting area/VE molecule on different subphases varied. The phenolic groups in the VE molecules were converted to a quinone structure, and the silver ions were mainly reduced to ellipsoidal and spherical nanoparticles. The arrangement of the nanoparticles changed from sparseness to compactness with reaction time. The electron diffraction pattern indicated that the silver nanoparticles were face-centered cubic (fcc) polycrystalline. Silver nanocomposite LB films with excellent quality could be formed on different substrates, indicating that the transfer ratio of monolayer containing silver nanoparticles is close to unity. The dynamic process of reduction of silver ions by VE LB films was also studied through monitoring the conductivity of an Ag2SO4 alkaline solution.
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Affiliation(s)
- Li Zhang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, PR China
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